SECOND ORDER DESIGN OF HORIZONTAL GPS NET

Abstract Precisions ratio of three-dimensional GPS baseline vector components, known in advance, enables the optimisation of three-dimensional GPS net with the optimisation of its horizontal part only. In a second order design of a pure GPS net some conclusions about the importance of particular GPS vectors in the net, with an assumption of uniform precision of horizontal components of GPS baseline vectors were searched for. In the second order design of a combined terrestrial and GPS net the precision of optimized GPS baseline vectors was, under the same assumption, compared with two typical types of geodetic observations in horizontal geodetic networks - distances and directions. Both cases were treated in a homogenous and isotropic horizontal GPS net.